<template>
  <div>
    <!-- Header 区域 -->
    <van-nav-bar fixed title="文章详情" left-arrow @click-left="$router.back()" />

    <!-- 文章信息区域 -->
    <div class="article-container">
      <!-- 文章标题 -->
      <h1 class="art-title">{{artObj.title}}</h1>

      <!-- 用户信息 -->
      <van-cell center :title="artObj.aut_name" :label="formatTimeAgoFn(artObj.pubdata)">
        <template #icon>
          <img :src="artObj.aut_photo" alt="avatar" class="avatar">
        </template>
        <template #default>
          <div>
            <van-button type="info" size="mini" v-if="artObj.is_followed" @click="followOrunFollowFn(true)">已关注
            </van-button>
            <van-button icon="plus" type="info" size="mini" plain v-else @click="followOrunFollowFn(false)">关注
            </van-button>
          </div>
        </template>
      </van-cell>

      <!-- 分割线 -->
      <van-divider></van-divider>

      <!-- 文章内容 -->
      <div class="art-content" v-html="artObj.content"></div>

      <!-- 分割线 -->
      <van-divider>End</van-divider>

      <!-- 点赞 -->
      <div class="like-box" id="like-box" >
        <van-button icon="good-job" type="danger" size="small" v-if="artObj.attitude===1" @click="likeOrDislikeFn(1)">
          已点赞</van-button>
        <van-button icon="good-job-o" type="danger" plain size="small" v-else @click="likeOrDislikeFn(-1)">点赞
        </van-button>
      </div>
    </div>

    <!-- 文章评论 -->
    <Comment v-if="artObj.art_id" :artId="artObj.art_id" :artObj="artObj"></Comment>
  </div>
</template>

<script>
import {
  getArticleDetailAPI,
  followAutAPI,
  unfollowAutAPI,
  likeArtAPI,
  dislikeArtAPI
} from '@/api/article.js'
import {
  Toast
} from 'vant'
import Comment from './comment.vue'
export default {
  name: 'ArticleDetail',
  data () {
    return {
      artObj: {}
    }
  },
  components: {
    Comment
  },
  async created () {
    const res = await getArticleDetailAPI({
      id: this.$route.query.art_id
    })
    console.log(res)
    this.artObj = res.data.data
  },
  methods: {
    // 关注和取关
    async followOrunFollowFn (isFollowed) {
      // 1.关注状态取反-操作vue变量
      this.artObj.is_followed = !this.artObj.is_followed
      // 2.同步到后台
      try {
        isFollowed ? await unfollowAutAPI({
          autId: this.artObj.aut_id
        }) : await followAutAPI({
          autId: this.artObj.aut_id
        })
        Toast.success(isFollowed ? '取关成功' : '关注成功')
      } catch (e) {
        Toast.fail(isFollowed ? '取关失败' : '关注失败')
      }
    },
    // 点赞和不点赞
    async likeOrDislikeFn (attitude) {
      // 1.同步到vue中
      this.artObj.attitude = this.artObj.attitude === 1 ? -1 : 1
      //   2.同步到后台
      try {
        attitude === 1 ? await dislikeArtAPI({
          artId: this.artObj.art_id
        }) : await likeArtAPI({
          artId: this.artObj.art_id
        })
        Toast.success(attitude === 1 ? '取消点赞成功' : '点赞成功')
      } catch (e) {
        Toast.fail(attitude === 1 ? '取消点赞失败' : '点赞失败')
      }
    }
  }

}

</script>

<style scoped lang="less">
  .article-container {
    padding: 10px;
    margin-top: 46px;
  }

  .art-title {
    font-size: 16px;
    font-weight: bold;
    margin: 10px 0;
  }

  .art-content {
    font-size: 12px;
    line-height: 24px;
    width: 100%;
    overflow-x: scroll;
    word-break: break-all;

    /deep/ img {
      width: 100%;
    }

    /deep/ pre {
      white-space: pre-wrap;
      word-wrap: break-word;
    }
  }

  .van-cell {
    padding: 5px 0;

    &::after {
      display: none;
    }
  }

  .avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: #f8f8f8;
    margin-right: 5px;
    border: none;
  }

  .like-box {
    display: flex;
    justify-content: center;
  }

</style>
